[thehotstuff]

Hi for all. About A47 headphone amplifier, the best solution is a regulated (or unregulated?) power supply 0-24V with rail splitter and buffer, or a dual power supply (or unregulated?) -15V/0V/+15V without anything else?

 

[UnknownAX]

IF your running the amp on AC power only, a real regulated dual supply. It's also the simplest option as you don't have to worry about the rail splitter and buffer setup. (which will never perform as well as a real dual supply, anyway).

You could use a dual secondary or center tap transformer and feed the output into a positive and a negative 12 or even 15V regulator. (Or, in the case of the dual sec. transformer, you could even use two positive regs...)

 

[thehotstuff]

Thanks for reply. The real problem is if all hum and noise can canceled. This problem don't present using a 12V lead acid battery whit rail splitter and buffer. I think to use this regulated power supply:http://www.circuitdiagram.org/images/9v-dual-power-supply-circuit.gif

 

[thehotstuff]

Up

 

[UnknownAX]

The power supply you posted will work nicely. You can use 12V regs instead of the 9V ones in the schematic. The psu has a proper ground and is regulated so hum probably shouldn't be an issue.

 

[thehotstuff]

I'll use a psu based on LM317/LM337, that ensure less noise